Gripping means



April 12, 1938. '.v. J. MolR GRIPPING MEANS Filed Aug. 13, 1935zNvENToR. WM

BY /44-@7 y Patented Apr; 12, 1938 PATENT oFF-ice vincenti: Meir;cleveland neightaoliiu, assigner" to`- The San-Electra Company,Cleveland', Qhio,A

sippliatinngust 1,3, 1935, seriaLNm 3559331 12I claimt (c1: 12s-Sir Thisinvention relates to gripping means;

An'` objectot the inventionf` ist tel provide an improved grippingmeans` which will effectively grip 'and pull objects. y

Another'object isfto provide an improved gripping meanswhichmay besimpl-y operated from a source'of power.

Another Objectis to: provide` animproved gripping meansV which wil-lbesimple in construction.

Another object istdprovide animproved grip.- Dingmeans which willloe-neat and attractive in appearancef -1 l is,

.Another object `is;l to providean improved" gripping; means which willalways! apply' a; predetermined pressure to objects gripped thereby.

Another object is toi provideA animproved gripping: means which mayEbe.; economically manufactured. i i

Another obfject isfto provide an improved gripping means which will haverelatively few moving parts. Another objectisto provide, animprovedvgripping means whichlmay be easilymanipulated.

Other objects will` hereinafter appearVIK The inventionwifllibeibettenunderstood from the description of one. practical embodimentthereof, (that chosen/1 for illustration comprising anatta'chmentr forpulling; hairsas is done in 'pluckingt human eyebrowscand. which `mayconveniently be operated by any device having a rotating. shaft,suchfkfor instance a,manicuring machine)` illustrated in@ the`accompatrying drawingpi-n which: l l i Figure -1 isal centrallongitudinal sectional View ofi thev deviceaabout twice/actual size,Ashowing the grippingk elements `closedpretracted position; l, Y,

Figure 2is a similar viewf showing the elements in. open extendedposition; Y i

FigureB is.- an.. elevational viewvof the device.; and l,

AFigures 4'and'5'l are vcross-sectional'views taken through cam I2! ofFigures 1 and 2, respectively;

The device illustrated in the'drawi'ng is` intended to be connected *toaflexible, shaft provided" with a clutcli, such'` frv instance as showninfmy" prior Patenti' N 200`8',920; patented July 23; 1935;Ittconsist'sof a generallyftubulari body or handle having/thrughoutaportion of its extent cyli'n'dri'cal''y bore or' aperture 21, andthroughout thef'remainder'of: its extent: an enlarged counterbore' or`aperture 3;y the ,two ap# erturesU meeting atl as substantial/1y squareor radiali` shoulder 4s Situatedfwithw the" smaller. aperture 2 is avpreferably a flexible one, above mentioned. application, by ai clutchwhich V55r bushing 5; which may" be secured in place in any desiredmanner,V conveniently by meansi of a pressed. t betweenV the bushing andthe body;

Rotatably mounted within,y this` bushing is' a spindle consisting ofasupporting cylindrical `5; portiony 6 ttingwithinl the bushing, areduced shank 1- projecting` beyond the bushing toward or beyond therear end: of the body, andf any enlarged forward end 8.

A set screwl 9` passesy through the*v body and 1,0 bushing: and/hasitsenel received within an a'nnular groove' I0- farmed"` in the exterior ofintermediate or supporting cylindrical part 6 o'f thespindle, and thuslocks it against axial movement. v

The forward end of the spindle isfprovidedwith a; continuousr` inclinedcam groove Mandat its end carries an arcuate ange l2, constitutinganother cam surface. Sli'dable over this portion ofthe spindle ist acylindrical plunger I3 having a-recessf Illy intowhichthe` end of5 thespindle proo jects. Y

A- set screw i5 is threaded through the plunger and has its end Withinthev cam. groove Il, while the exterior-of the plunger has an axiallyeX- tending slotr or keyway t6y into which projects the inner end of asetI screw I1 threaded through the body, which. prevents the plungerfrom rotating therein;

'I'he forward end ofv the plunger has secured o to it a fixed` jaw I-8-,and pivotally mountedona "o pin I9 is a lever including a movable jaw 20adapted to bear against the xedjaw. 'I'he jaws are urged towardeachother by a` tension springY 2L 0.5

The other end of the lever is formedt into a bearing surface 22arrangedin the path of the arcuatel cam. of. the spindle, and whenengaged by this cam is moved toward the` axis` of the device against thetensioncofthe spring, causing 4,0-

the movable jaw to" separate from the xed jaw.

Whenthe spindleis rotated so that the cam surface of arcuate flange l-2haspassed beyond bearing sur-face 22, it no longer holds'` the jawsapart, but these are drawn togetheigas:y shown in Figure 1, by thespring 2|.

The plunger is reciprocated-by the-cam groove acting upon thesetfscrewI5.

A`A slotted cap` or coverF 23v is frictionally/ retained upon thereducedend 2li of the body to enclose theplunger and rear partrofthe'ja'ws.

The operationof the device is as follows: c

The shank. 1- is clutched tota-` rotatable shaft, sucht` asf shown in myalso may be as shown therein, and the shaft set in rotation. Theoperator, using the body of the device as a handle, manipulates it asdesired, positioning the jaws in such a manner that they may grip hairswhich it is desired to extract from a subject.

The rotation of the spindle causes the plunger to reciprocate and thejaws to open and close.

It will be apparent that the cam slot and arcuate cam surface are sorelated that the jaws are separated by the cam surface of flange I2while the plunger is being projected toward the left, as shown in thedrawing, by cam l I so that the jaws are permitted to close or cometogether when at their most extended position, that illustrated inFigure 2.

Thereafter, the jaws remain clamped upon any object which they haveseized, such as hair, while the plunger is retracted, and when it hasreached its extreme retracted position, the jaws are again separated torelease the article gripped.

The operator need only place the jaws at the hairs it is desired toextract and the mechanism grips, pulls, and releases them. The pressureis at all times determined by the spring, so that if several hairs aregripped simultaneously, the pressure will not be suiicient to cut them,as might be the case if the jaws were positively closed. f

Similarly, should the jaws grip the skin of the subject no damage canresult. However, the jaws should open only a relatively small distanceso that it will be difcult to grip the skin.

The device is practically free from vibration and so greatly simplifiesits manipulation.

While I have described the illustrated embodiment of my invention insome particularity, obviously many other embodiments, variations andmodifications will readily occur to those skilled in this art, and I donot therefore limit myself tothe precise details shown and described,but claim as my invention all embodiments, modifications and variationscoming within the scope of the appended claims.

I claim:

l. A power driven gripping device comprising a handle, a plungerslidable therein, means reciprocating said plunger in said handle, tworelatively movable jaws carried by said plunger, resilient means urgingsaid jaws toward each other, and means separating said jaws duringreciprocation in one direction.

2. A gripping' device comprising a handle, a rotatable spindle mountedtherein and provided with two cam surfaces, a plunger reciprocable inthe handle and provided with a pair of relatively movable jaws, meansconnected to the plunger engaging one of said cam surfaces, and meansassociated with one of the jaws and engageable by the other cam surface.

3. A gripping device comprising a handle, a rotatable spindle mountedtherein, a plunger reciprocable in the handle, a gripping jaw pivoted tosaid plunger, a cam carried by said spindle arranged to contact said jawto rotate the same about its pivot.

4. A gripping device comprising a handle, a rotatable spindle mountedtherein, a plunger reciprocable in the handle, a gripping jaw pivoted tosaid plunger, a cam carried by said spindle arranged to contact said jawto rotate the same about its pivot, and a fixed jaw carried by saidplunger, and resilient means moving said jaws toward each other.

5. A gripping 'device comprising a tubular said cam and said plunger forsleeve, a spindle journalled therein, bearing means locking the spindleagainst axial motion relative the sleeve, a plunger slidable in thesleeve, key means preventing rotation of the plunger with respect to thesleeve, a movable element carried by the plunger, resilient means urgingthe element in one direction, a cam carried by the spindle and arrangedto move said element in the opposite direction, a second cam carried bythe spindle, and connections between reciprocating the plunger.

6. A gripping device comprising a tubular sleeve, a spindle journalledtherein, an annular groove in the spindle, a xed projection within thesleeve extending into said annular groove, a plunger slidable within thesleeve and in telescopio arrangement to both the sleeve and the spindle,an inclined continuous groove in the spindle, and a projection insidethe plunger entering said groove.

7. A gripping device comprising a tubular sleeve, a spindle journalledtherein, an annular groove in the spindle, a fixed projection within thesleeve extending into said annular groove, a plunger slidable within thesleeve and in telescopic arrangement to both the sleeve and the spindle,an inclined continuous groove in the spindle, a projection inside theplunger entering said groove, and an element pivoted to said plungerhaving one end projecting beyond the same andits other end receivedwithin the hollow of the plunger, a cam carried by the spindlepositioned to engage said last `mentioned end of the element. y

8. A gripping device comprising a tubular sleeve, a spindle journalledtherein, an annular groove in the spindle, a xed projection within thesleeve extending into said annular groove, a plunger slidable within thesleeve and in telescopic arrangement to both the sleeve and the spindle,an inclined continuous groove in the spindle, a projection inside theplunger entering said groove, an element pivoted to said plunger havingone end vprojecting beyond the same and its other end received withinthe hollow of the plunger, a cam carried by the spindle positioned toengage saidl last mentioned end of the element, and resilient meansurging the element in one direction.

9. A gripping device comprising a tubular sleeve, a spindle journalledtherein, an annular groove in the spindle, a fixed projection within thesleeve extending into said annular groove, a

plunger slidable within the sleeve and in telef scopic arrangement toboth the sleeve and the spindle, an inclined continuous groove in thespindle, a projection inside the plunger entering said groove, anelement pivoted to said plunger having one end projecting beyond thesame and its other endreceived within the hollow of the plunger, anarcuate cylindrical flange on the spindle positioned to engage lsaidlast mentioned end of the element.

l0. A gripping device comprising a tubular sleeve, a spindle journalledtherein, an annular groove in the spindle, a fixed projection within thesleeve extending into said annular groove, a hollow plunger slidablewithin the sleeve and in telescopic arrangement to both the sleeve andthe spindle, an inclined continuous groove in the spindle, a projectioninside the plunger entering said groove, an element pivoted to saidplunger having one end projecting beyond the same and 2,113,962 `itsother end received within the hollow of the plunger, and aparti-cylindrical ilange on the spindle positioned to engage said lastmentioned end of the element, and a cover frictionally engaging thesleeve and enclosing the end of the plunger.

11. A gripping device comprising a tubular sleeve, a bushing securedtherein, a spindle journalled in the bushing, an annular groove in thespindle, a projection extending into said annular groove and xed to saidsleeve, said spindle having a shank adapted to be connected to arotating element, a cam groove in said spindle vand an arcuatecylindrical cam on the end thereof, a plunger in telescopic engagementwith the interior of the sleeve and exterior of the spindle,

`means keying the plunger to the spindle, a projection Within` theplunger engaging the rst mentioned cam of the spindle, a fixed jawsecured to the plunger, a movable jaw pivoted to ythe plunger, and aspring urging the movable jaw toward the xed jaw, one end of the movablejaw being positioned in the path of the arcuate cam.

12. VA `gripping device comprising a tubular sleeve, a bushing securedtherein, a spindle journalled in the bushing, an annular groove in thespindle, a projection extending into said annular groove and iixed tosaid sleeve, said spindle having a shank adapted to be connected to arotating element, a cam groove in the said spindle and an arcuatecylindrical cam on the end thereof, a plunger in telescopic engagementwith the interior of the sleeve and exterior of the spindle, meanskeying the plunger to the spindle, a projection Within the plungerengaging the rst mentioned cam of the spindle, a fixed jaw secured tothe plunger, a movable jaw pivoted to the plunger, a spring urging themovable jaw toward the iixed jaw, one end of the movable jaw beingpositioned in the path of the arcuate cam, and a cover frictionallysecured to the sleeve enclosing the plunger and provided with anaperture through which the jaws project.

VINCENT J. MOIR.

